Which substance contains bonds that involved the transfer of electrons from one atom to another?
A) CC14
B) Cao
C) NH3
D) Br2

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Which of the following units is not an official si unit? mole liter kilogram ampere